Motion-retarding device.



S. LEHIVIAN & H. D. KENUIG.

MOTION RETARDING DEVICE. APPLlCATlON FILED JULY 21.1917

Patented. Oct. 15, 1918 2 bHEETS-SHEET1 v a 601mm hm V t w o 0 o M N 1 R w L m o o 0 ow N Q & 2 k 1 S. LEHMAN & H. D. KENDiG. MOTION RETARDING DEVICE.

APPLICATION FILED JULY 21,1917.

1 81,594 Patented 0@t.15,1918 2 SHEETSSHEET 2.

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SYLVESTER- LEHMAN AND HARRY D. KENDIG, OF WINDBER, PENNSYLVANIA.

MOTION-RETARDING DEVICE.

Application filed July 21. 1917.

To all 10. mm it may concern:

Be it known that. we, SYLvnsTEn LEH MAX and HARRY D. Kimble, citizens of the l nited States. and residents of 'indber. in the county of Somerset and State of Pennsylvania, ha e invented certain new and useful Improvements in Motion-Ret-arding Devices, of which the following is a specification.

This invention relates to improvements in brakes and has more especial reference to a motion retarding device for railway rolling stock.

The invention has for its dominant object to provide a railway rolling stock retarding device which is operatively associated with the rails of a track and which. when operated. will engage the wheels of the rolling stock passing thereover and exert sutlicient pressure on the same to retard the movement of said rolling stock.

Another and equally important object of the invention is to provide the retarding device with means whereby the pressure exerted upon the rolling stock wheels may be varied. such as conditions or preference may dictate.

It is also an object of the invention to provide novel means for moving the, braking elements of the device in a manner to evenly apply the braking pressure to the wheels of the rolling stock.

()ther independent objects are to provide features of construction of portions of the device which tend toward the. attainment of the above aims irrespective of the relation in which they are used.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction. combinations of elements a nda rrangemcnt of parts which will be exemplified in the construction hereinafter set forth. and the scope of the application of which will be indicated in the fol lowing claims.

Tn the accompanving drawings. wherein is shown one of various possible embodiments of our in ventiou:

Figure l is a top plan of the improved motion retarding device;

Fig. 2 is a vertical transverse section there through:

Fig. J.) is a detail in plan and partial sec- Specification of Letters Patent.

Patented Oct. 15, 1918.

Serial No. 182,035.

t-ion of the means for operating the braking elements of the device; and

Fig. +1 is a fragmentary detail in perspective of one of the braking elements.

Similar characters of reference will refer to similar parts throughout the several views of the drawings.

Having more particular reference to the drawings. the rails R of the track are arranged over a platform 1. the platform. in turn, being arranged over a pit in which the operating mechanism of the improved motion retarding device is arranged.

Wheel guards 2, comprising strips of angle iron having the extremities thereof curved as at 3 are arranged adjacent the opposite sides of the several rails R and are secured to the. platform 1 through the medium of bolts passing downwardly through the bolsters upon which the platform is supported. By providing the guards. it will be evident that the wheels of the rolling stock. referred to by the letter V. will be prevented from over-riding the rails R when the braking ele ments. hereinafter described are engaged with the flanges of the same.

A metal strip 5 is arranged longitudinallv of the platform 1 and parallel to the rails It and has a plurality of openings formed in the same. through which stub-shafts (3 are passed. stop collars 7 being arranged upon the upper portions of the said shafts and having bearing on the metal strip 5 as shown in Fig. 2. Bearing pieces 8 are also arranged lieneath the platform 1 and the openings formed therein and in the metal strip 5. these hearings being secured in position through the medium of bolt. 9 which pass through the same and through the platform and metal strip 5. Levers 10 are fixedly mounted upon the upper extremities of each of the stub-shafts 6 and have pivotal engagen ient with arms 11. as at 12. which arms extend into engagement with brahing shoesor elements 13 formed of angle metal and havingtheir opposite ends curved out wardlv as at H. The braking shoes 13 arearranged adjacent the tread portions of the rails R and have their engaging faces covered with friction material 15. in order that the same, will etlicientli serve as retarding means when engaged with the flanges of the wheels W of the rolling stock passing thereover.

A plurality of brackets 16 are secured to the inner faces of the bolsters supporting the platform 1 and are arranged directly beneath openings 17 formed in the said platform. whereby supporting arms 18 which are pivotally engaged with the said b 'ackets as at 19 may be pivotally engaged with other brackets 20. these brackets being secured to the under faces of the seve 'al braking shoes 13. In this way, it will be appreciated that the braking shoes 13 will be properly sup ported with relation to the tread portions of the rails R and as av consequence. will be enabled to properly function.

Fixedly mounted upon the lower extremities of the stub-shafts which are iournaled in bearings formed in cross bars 21, secured to the under faces of the bolsters supporting the platform 1, are levers the free ends of which are bifurcated as at 23, and pivotally connected with an operating bar 24 as at 25, the said operating bar extending longitudinally of the pit in which the operating mechanism of the retarding device is arranged.

An operating lever 26 is arranged in prox imity with one end of the pit and has connections with the adiacent end of the operating bar 24 through the medium of a turn buckle 27. The remaining end of the operating bar is engaged by a contractile coiled spring 28, connected to a bracket 29 which is secured to a suitable base 30 arranged in the said pit. To pivotally support the operating lever 26. a bearing bracket 31 secured to one side of the platform supporting bolster and receives the adjacent end of the said operating lever thereon.

A cylinder 32 is arranged in proximity of the opposite end of the operating lever 26 and has a piston working therein. the rod 33 of which is pivotally connected to the operating lever as at 34. Suitable control means are provided whereby the passage of motive fluid to the cylinder 32 may be controlled at will by the operator. Thus. when motive fluid is admitted to the cylinder. the piston will be forced in a direction to cause movement of the operating bar 24 and as a consequence. movement of the braking shoes 13 inttP engagement with the flanges of the wheels of IOllilig stock passing over the rails R. In this wav. the movement of the said rolling stock will be retarded and if desired, the same brought to a full stop. Obviously, the braking pressure applied to the flanges of the rolling stock wheels may be varied by the admittance of motive fluid to the cylinder 32 and the adjusting of the turn buckle 27 which connects the operating bar 2% to the lever 26. Upon the release or discharge of the motive fluid from the cylinder the spring 28 will cause return of the operating bar 24 to its normal or inoperative position and as a consequence the withdrawing of the braking shoes 13 from engagement with the railway rolling stock wheel flanges.

Manifestlv. the construction shown is capable of conside able. modification and such modification as is within the scope of our claims, we consider within the spirit of our invention.

lVe claim:

1. In combination with the rails of a track, longitudinally extending braking shoes positioned in proximity to the inner sides thereof, av plurality of longitudinally disposed vertical shafts arranged intern'iediate said rails, arms mounted on the upper ends of said shafts connected at their opposite ends to said shoes, brackets supported below said rails, arms pivoted to the brackets and to said shoes, and means for imparting motion collectively to said shafts.

:2. In combination with the rails of a track, longitudinally extending braking shoes positioned in proximity to the inner sides thereof, means arranged between and extending throughout the lengths of said shoes and connected thereto for imparting outward motion to the same, means for varying the outward movement of said shoes, brackets supported below said rails, and arms pivoted to said brackets and to said shoes for supporting the same for sliding movement with relation to the rails.

In testimony whereof we aflix our signatures hereto.

SYLVESTER LEI-IMAN. HARRY D. KENDIG. 

